html{
    font-size: 50px;
} 
a{
    text-decoration: none;
}
// 划分份数15份
@num:15;
//320
@media screen and (min-width:320px){
    html{
        font-size: (320px / @num); 
    }
}
//360
@media screen and (min-width:360px){
    html{
        font-size: (360px / @num); 
    }
}
// 375 iphone 
@media screen and (min-width:375px){
    html{
        font-size: (375px / @num); 
    }
}
//384
@media screen and (min-width:384px){
    html{
        font-size: (384px / @num); 
    }
}
//400
@media screen and (min-width:400px){
    html{
        font-size: (400px / @num); 
    }
}
//414
@media screen and (min-width:414px){
    html{
        font-size: (414px / @num); 
    }
}
//424
@media screen and (min-width:424px){
    html{
        font-size: (424px / @num); 
    }
}
//480
@media screen and (min-width:480px){
    html{
        font-size: (480px / @num); 
    }
}
//540
@media screen and (min-width:540px){
    html{
        font-size: (540px / @num); 
    }
}
//720
@media screen and (min-width:720px){
    html{
        font-size: (720px / @num); 
    }
}
//750
@media screen and (min-width:750px){
    html{
        font-size: (750px / @num); 
    }
}